var express = require('express')
var path = require('path')
var cookieParser = require('cookie-parser')
var bodyParser = require('body-parser')
var session = require('express-session')
var log4js = require('log4js')
var log = log4js.getLogger('app')

var index = require('./routes/index')

var app = express()

// view engine setup
app.set('views', path.join(__dirname, 'views'))
app.set('view engine', 'ejs')

app.use(log4js.connectLogger(log4js.getLogger('http'), { level: 'auto' }))
app.use(bodyParser.json())
app.use(bodyParser.urlencoded({ extended: true }))
app.use(cookieParser())
app.use(express.static(path.join(__dirname, 'public')))
app.use(session({
  secret: 'graph',
  resave: false,
  saveUninitialized: true
}))

app.use('/', index)

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  var err = new Error('Not Found')
  err.status = 404
  next(err)
})

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function (err, req, res, next) {
    log.error("Something went wrong:", err)
    res.status(err.status || 500)
    res.render('error', {
      message: err.message,
      error: err
    })
  })
}

// production error handler
// no stacktraces leaked to user
app.use(function (err, req, res, next) {
  log.error("Something went wrong:", err)
  res.status(err.status || 500)
  res.render('error', {
    message: err.message,
    error: {}
  })
})

module.exports = app
